/*
* Copyright 2003-2016 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package jetbrains.mps.scope;
import jetbrains.mps.project.FilteredScope;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.mps.openapi.model.SModel;
import org.jetbrains.mps.openapi.module.SModule;
import org.jetbrains.mps.openapi.module.SearchScope;
import org.jetbrains.mps.util.Condition;
/**
* {@link SearchScope Scope} filtered with conditions.
*
* XXX perhaps, shall root at BaseScope instead of FilteredScope as with Java8 filtering is easy to accomplish with streams and predicates.
* The only obstacle is that it's not handy to use predicates from MPS (could not use method references nor invoke Predicate's defaults to construct compound)
* Perhaps, could extend Predicate in Condition, with default test() implementation to facilitate migration?
* @author Artem Tikhomirov
* @since 3.4
*/
public final class ConditionalScope extends FilteredScope {
private final Condition<SModule> myModuleFilter;
private final Condition<SModel> myModelFilter;
/**
* @param scope scope to filter with conditions, mandatory.
* @param moduleCondition optional condition for modules of the scope to match, {@linkplain Condition#always() any module matches} if unspecified.
* @param modelCondition optional condition for models of the scope to match, {@linkplain Condition#always() any model matches} if unspecified.
*/
public ConditionalScope(@NotNull SearchScope scope, @Nullable Condition<SModule> moduleCondition, @Nullable Condition<SModel> modelCondition) {
super(scope);
myModuleFilter = moduleCondition == null ? Condition.always() : moduleCondition;
myModelFilter = modelCondition == null ? Condition.always() : modelCondition;
}
@Override
protected boolean acceptModule(SModule module) {
return myModuleFilter.met(module);
}
@Override
protected boolean acceptModel(SModel model) {
return myModelFilter.met(model);
}
}